Ever since Kevin Hart stepped down as host in December following resurfaced homophobic tweets, Hollywood's biggest night has been plagued by controversy, from axing awards and nominated songs from the telecast, to not inviting back past acting winners as presenters (all of which the Academy has walked back on). And with no best-picture front-runner, there's no telling what might happen during Sunday's show (ABC, 8 ET/5 PT).

12. Jennifer Lawrence trips over her dress (2013)

Cementing her status as Hollywood's most relatable (and clumsiest) star, the then-22-year-old fell as she climbed the steps to accept her best-actress trophy for "Silver Linings Playbook."

Cher wearing Bob Mackie in 1988.(Photo: LENNOX McLENDON/AP)

11. Cher turns heads in a see-through dress (1988)

Bjork had her swan dress and golden eggs at the 2001 awards, while Celine Dion wore a backward tuxedo and diamond-studded sunglasses to the show in 1999. But no one has made bolder fashion statements at the Oscars than Cher, who has unforgettably donned feathered headdresses and belly-baring gowns. Her jewel-encrusted naked dress may have been her most daring, which she wore when she won best actress for "Moonstruck."

The stand-up comedian made for a searing Oscar host amid outrage over the second year of #OscarsSoWhite, taking aim at the lack of diversity in the acting nominees, and stars such as Will Smith and Jada Pinkett Smith who boycotted the ceremony because of it. "Jada boycotting the Oscars is like me boycotting Rihanna's panties," he jabbed. "I wasn't invited!"

8. Rob Lowe opens the show with a bizarre duet (1989)

The actor was endlessly lampooned for his participation in this campy opening number, in which he performed a duet of "Proud Mary" with "Snow White"-clad newcomer Eileen Bowman. Stars including Paul Newman and Julie Andrews slammed the disastrous 10-plus-minute number as an "embarrassment" in an open letter, and Disney filed a copyright infringement lawsuit against the Academy for using its character.

Taking best supporting actress for "Girl, Interrupted," Jolie uncomfortably thanked her older brother, James Haven, saying, “I’m in shock and I’m so in love with my brother right now." They were later photographed briefly locking lips at the event, fueling speculation about their curiously close relationship.

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Shortly before Elizabeth Taylor was set to announce best picture, gay rights activist Robert Opel stripped naked and ran across the stage behind Oscar co-host David Niven. He was not arrested, and merely explained that it was "one of those one-time things."

5. Marlon Brando refuses to accept his Oscar (1973)

Instead of walking to the stage when he won best actor for "The Godfather," Brando sent Native American activist Sacheen Littlefeather up to protest the misrepresentation of American Indians in Hollywood. It's one of the earliest instances of actors getting political during their Oscar speeches, with Patricia Arquette singling out the wage gap and Leonardo DiCaprio addressing climate change in recent years.

4. Adrien Brody lays an uninvited kiss on Halle Berry (2003)

In a move that's become even more cringeworthy to watch in light of the sexual harassment allegations that have rocked Hollywood this past year and a half, Brody brings Berry in for a long, awkward kiss when he takes the podium to accept best actor for "The Pianist." The unplanned moment came just a year after Berry became the first black woman ever to win best actress for her performance in "Monster's Ball."

3. Marisa Tomei upsets with best-supporting actress win (1993)

After Tomei beat out veterans Vanessa Redgrave and Joan Plowright for her comedic tour de force in "My Cousin Vinny," conspiracy theories began to circulate in entertainment publications that presenter Jack Palance couldn't read the winner's card and called the last name on the teleprompter. The rumor has since been debunked by the Academy and footage from the ceremony, which shows Palance reading the card.

1932/1933 - 'Cavalcade' | The film, starring Clive Brook and Diana Wynyard, touched on historic events like the sinking of the Titanic and the death of Queen Victoria in a look at Londoners from 1899 through 1933. Photofest

1934 - 'It Happened One Night' | Clark Gable and Claudette Colbert both won Academy Awards for their performances in this romantic comedy about a spoiled heiress who runs away and into the path of a reporter looking for a story. Sony Home Entertainment

1983 - 'Terms of Endearment' | Shirley MacLaine, left, Debra Winger and Jack Nicholson were all nominated for their roles. MacLaine beat out Winger for best actress while Nicholson took home another best-actor award. Paramount Pictures

2009 - 'The Hurt Locker' | Jeremy Renner, pictured, received a best-actor nomination but did not win. The film, however, won six Oscars, and Kathryn Bigelow became the first woman to win an Oscar for directing. Summit Entertainment

2011 – 'The Artist' | Jean Dujardin won the Oscar for best actor while Berenice Bejo received a best supporting actress nomination. The (mostly) silent film won a total of five Academy Awards. The Weinstein Co.

2013 - '12 Years A Slave' | Lupita Nyong'o won the best supporting actress Oscar while Chiwetel Ejiofor received a best actor nomination for his performance in this wrenching drama based on the memoir of former slave Solomon Northup. Francois Duhamel, Fox Searchlight

2016 - 'Moonlight' | In the wildest Oscar ending ever, 'La La Land' was erroneously announced as best picture. But in reality, the vote went to 'Moonlight,' the coming-of-age drama starring Mahershala Ali (left) and Alex Hibbert. The film won three Oscars, including best supporting actor for Ali and screenplay for director Barry Jenkins. David Bornfriend, A24

2. 'Crash' takes best picture over 'Brokeback Mountain' (2006)

In what's considered one of the greatest upsets in Oscar history, Paul Haggis' race drama beat out Ang Lee's critically favored front-runner, making it only the second film ever to win the top prize without a Golden Globes picture nomination.

"There's been a mistake." Those four words changed the course of Oscars history in 2016, when 2½ minutes into the "La La Land" team's best-picture acceptance speeches, producer Jordan Horowitz informed the crowd that "Moonlight" had actually won. The jaw-dropping gaffe – which was met with stunned disbelief by those in the room and at home – was the result of a mix-up by accounting firm PricewaterhouseCoopers, who mistakenly handed presenters Faye Dunaway and Warren Beatty the wrong category envelope.

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With a few notable exceptions, these aren't always the gowns that make the Oscars best-dressed lists. For the most part, the frocks that have faced the audience from the winner's podium aren't particularly daring or even memorable. But they get a very important job done very well: They let the winners shine. ROBERT DEUTSCH/USA TODAY

2005 | Best actress: Hilary Swank in Guy Laroche | When it comes to a total look, just one something should stand out, from a red lip to, in Swank's case, a bare back. The body-skimming, embellishment-free frock was all about form, whose function was to flaunt the "Million Dollar Baby" star's enviable figure. DAN MacMEDAN/USA TODAY

2005 | Best supporting actress: Cate Blanchett in Valentino | The "Aviator" winner's gown foreshadowed the frenzy for all things asymmetrical, and it coupled a pair of unexpected, but complementary, colors: yellow and burgundy. DAN MacMEDAN/USA TODAY

2006 | Best actress: Reese Witherspoon in vintage Christian Dior | When Witherspoon won that year for "Walk the Line," she told reporters she found her 1955 gown while shopping at a vintage clothing boutique in Paris. DAN MacMEDAN/USA TODAY

2006 | Best supporting actress: Rachel Weisz in Narciso Rodriguez | The actress was pregnant with her son Henry (with former partner Darren Aronofsky) when she won for "The Constant Gardener." DAN MacMEDAN/USA TODAY

2007 | Best supporting actress: Jennifer Hudson in Oscar de la Renta | Despite stealing the show in "Dreamgirls," on the red carpet, Hudson's choice of a chocolate taffeta gown with a contrasting bolero was panned by critics. DAN MacMEDAN/USA TODAY

2008 | Best supporting actress: Tilda Swinton in Lanvin | The Hefty bag (to paraphrase one of the kinder armchair critiques) worn by the "Michael Clayton" winner has emerged as the epitome of how, on the right person with the right confidence, chic and street can co-exist, even on the world's most-watched red carpet. DAN MacMEDAN/USA TODAY

2009 | Best supporting actress: Penelope Cruz in vintage Pierre Balmain | Cruz won for "Vicky Cristina Barcelona" and scooped up her Oscar in a romantic strapless gown with her hair swept up in a chignon. FRAZER HARRISON/GETTY IMAGES

2011 | Best actress: Natalie Portman in Rodarte | The "Black Swan" star, then pregnant with her first child, famously declined to wear a Dior dress to the Oscars that year (she was the face of a Dior fragrance) after then-head designer John Galliano was revealed to have made anti-Semitic remarks. DAN MacMEDAN/USA TODAY

2012 | Best actress: Meryl Streep in Lanvin | Streep had won two trophies before, but leave it to her third award, at the age of 62 for "The Iron Lady," for her to shine sartorially as well as dramatically. Not since Julie Christie's turn as Oscar's 1966 "Darling" had gold and gold gone hand in hand so beautifully. DAN MacMEDAN/USA TODAY

2013 | Best supporting actress: Anne Hathaway in Prada | The "Les Miserables" star famously switched a Valentino Oscar dress at the last minute for this pale pink Prada one, after finding out her co-star Amanda Seyfried was wearing a similar design. She later apologized to the designer. DAN MacMEDAN/USA TODAY

2014 | Best actress: Cate Blanchett in Armani Prive | The "Blue Jasmine" star stunned in this embellished nude gown, which was a late-game decision. "It was between three (Armani) dresses, and I made the decision 10 minutes before I left," she told People. TODD PLITT/USA TODAY

2014 | Best supporting actress: Lupita Nyong'o in Prada | The "12 Years A Slave" star hit the red carpet wearing a custom light blue silk georgette gown with a deep V-neck top and low-cut sides. "It's a blue that reminds me of Nairobi, and so I wanted to have a little bit of home," she told E!'s Ryan Seacrest. JORDAN STRAUSS/INVISION VIA AP

2015 | Best actress: Julianne Moore in Chanel | Moore, who won for "Still Alice," wore a shimmering, strapless custom gown designed by Karl Lagerfeld. It took a whopping 927 hours to create. DAN MacMEDAN/USA TODAY

2015 | Best supporting actress: Patricia Arquette in Rosetta Getty | The "Boyhood" actress took home her statuette in a black-and-white one-shoulder gown, and memorably called for wage equality from the Oscars stage. FRAZER HARRISON/GETTY IMAGES

2016 | Best supporting actress: Alicia Vikander in Louis Vuitton | The "Danish Girl" star's glittering yellow gown drew comparisons to "Beauty and the Beast," which didn't upset her in the least. "I think if you would've asked 5-year-old Alicia what her biggest dream was, it was probably to be Belle," she told Entertainment Tonight. DAN MacMEDAN/USA TODAY